Overshoot is when a species reproduces to a number that its environment can't sustain.
In 1944, for example, 29 reindeer were introduced onto St. Matthew Island in the Bering Sea. With few competitors, no predators and plenty to eat, the herd increased to about 6,000 by the summer of 1963, consuming almost all available food. That winter most of them died. The surviving population in 1966 numbered 42.
In 1944, for example, 29 reindeer were introduced onto St. Matthew Island in the Bering Sea. With few competitors, no predators and plenty to eat, the herd increased to about 6,000 by the summer of 1963, consuming almost all available food. That winter most of them died. The surviving population in 1966 numbered 42.
The human population is now 6.5 billion. Given Earth's limits, there already are too many of us for the long run. But the day of reckoning is many years away, and it is notoriously difficult for political leaders to seek moderate sacrifice today to prevent terrible sacrifice tomorrow when there is too little general recognition of the trouble ahead.
...this can't last. The aquifers, oil and natural gas that made possible a fourfold population increase are finite. Over the coming decades, petroleum will become harder and harder to find, extract and put to use, until eventually it becomes unavailable for agriculture in any significant amount. Meanwhile, another 2 billion people are predicted worldwide by 2050.
Is the situation really this dire? In our dependence on the environment for food and water, we most certainly are subject to those constraints. Without a solution, we will die just as surely as the St. Matthew reindeer.
It's hard to be optimistic. There is probably no real solution to this problem, only halfway measures to lessen the eventual impact. And whatever we do to support population growth will only make overshoot worse in the end. Read full from David Bacon here